<template>
    <div class="login_container">
        <div class="login_box">
            <div class="avatar_box">
                <!-- 头像 -->
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录区域 -->
                <el-form ref="loginFormRef" label-width="0px" class="login_form" :model="loginForm" :rules="loginFormRules">
                    <!-- 用户名 -->
                    <el-form-item prop="username">
                        <el-input prefix-icon="el-icon-user" placeholder="请输入用户名" v-model="loginForm.username"></el-input>
                    </el-form-item>
                     <!-- 密码 -->
                    <el-form-item prop="password">
                        <el-input type="password" prefix-icon="el-icon-s-goods" placeholder="请输入密码" v-model="loginForm.password"></el-input>
                    </el-form-item>
                    <!-- 按钮区域 -->
                    <el-form-item class="btns">
                         <el-button type="primary" @click="login">登录</el-button>
                         <el-button type="info" @click="resetLoginForm">重置</el-button>
                    </el-form-item>
                </el-form>
        </div>
    </div>
</template>

<script>
export default {
    data(){
        return{
            // 登录表单的数据绑定对象
            loginForm:{
                username: '',
                password: ''
            },
            // 表单的验证规则对象
            loginFormRules:{
                // 验证用户名是否合法
                username: [
                     { required: true, message: '请输入用户名', trigger: 'blur' },
                     { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                // 验证密码是否合法
                password: [
                    { required: true, message: '请输入密码', trigger: 'blur' },
                    { min: 6, max: 15, message: '长度在 6 到 15 位', trigger: 'blur' }
                ]
            }

        }
    },
    methods: {
        resetLoginForm() {
            // 重置表单
            this.$refs.loginFormRef.resetFields();
        },
        login(){
            // 表单预先校验
            this.$refs.loginFormRef.validate(async (valid) => {
                if(!valid) return;
                const {data:res} = await this.$http.post('login',this.loginForm);
                if(res.meta.status !== 200) return this.$message.error('登录失败！');
                this.$message.success('登录成功！');
                // console.log(res);
                window.sessionStorage.setItem("token",res.data.token);
                this.$router.push('/home')
            });
        }
    }
}
</script>

<style lang="less" scoped>
   .login_container{
       background: #5a87b4;
       height: 100%;
   }
   .login_box{
       width: 450px;
       height: 300px;
       background: #fff;
       border-radius: 3px;
       position: absolute;
       left: 50%;
       top: 50%;
       transform: translate(-50%,-50%);
   }
   .avatar_box{
       height: 100px;
       width: 100px;
       border: 1px solid #eee;
       border-radius: 50%;
       padding: 10px;
       position: absolute;
       left: 50%;
       transform: translate(-50%,-50%);
       background: #fff;
       img{
           width: 100%;
           height: 100%;
           border-radius: 50%;
           background-color: #eee;
       }
   }
   .btns{
       display: flex;
       justify-content: flex-end;
   }
   .login_form{
       box-sizing: border-box;
       margin: 100px auto;
       width: 75%;
   }

</style>